for loop numbers to be hidden pagination - php

Question

so i have this loop like this
<?php for($i = 0; $i <$size; $i++) { ?>
<li>
<a pagenumber="<?php $i+1?>" class="pagination" href="#"><?php $i+1?></a></li>
<?php } ?>
so it kinda looks like this:
1 2 3 4 5 6 7 8
but the problem here is when there is like say a 100 page there is alot of numbers how can i do somthing like this
1 2 3 4 5 .... 98 99 100
and not have numbers from 1 to 100 just keep showing up
so for example when i click 5 then it should show
6 7 8 9...98 99 100
or somthing better i am not able to figure how to go about this

Answer 1

You don't need to loop.
You can use array_slice and implode to get the expected output.
I added $n to give you the option to output one page previous to the selected if it's not page 1 that is selected.
$pages = range(1,100); // range(1, $size);
$page = 1; // page selected by user
if($page ==1){
$n = 0;
}else{
$n = 1;
}
echo implode(" ", array_slice($pages, $page-1-$n, 5)) . " . . . . " . Implode(" ", array_slice($pages, -3));
Output:
1 2 3 4 5 . . . . 98 99 100
With page 5 selected:
4 5 6 7 8 . . . . 98 99 100
https://3v4l.org/doZbI
If you want to stay in the loop then you can use two loops and one optional echo.
$size =100;
$page = 5;
// Echo one page prior to selected page
if($page != 1){
Echo '<a pagenumber="' . ($page-1) .'" class="pagination" href="#">' . ($page-1) . '</a></li>';
Echo ' . '; // show dot for current page
}
// Echo +1 -> +5
For($i = $page+1; $i < $page+6; $i++){
Echo '<a pagenumber="' . $i .'" class="pagination" href="#">' . $i . '</a></li> ';
}
Echo '. . . . ';
// Echo last three pages
For($i = $size-3; $i <= $size; $i++){
Echo '<a pagenumber="' . $i .'" class="pagination" href="#">' . $i . '</a></li> ';
}
https://3v4l.org/1P0W3